From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Juanma Barranquero" Newsgroups: gmane.emacs.bugs Subject: bug#1448: 23.0.60; update to cvs emacs crash report Date: Fri, 28 Nov 2008 10:25:09 +0100 Message-ID: References: <81hc5s5t2y.fsf@blackmagic-design.com> Reply-To: Juanma Barranquero , 1448@emacsbugs.donarmstrong.com NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1227864637 27156 80.91.229.12 (28 Nov 2008 09:30:37 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 28 Nov 2008 09:30:37 +0000 (UTC) Cc: 1448@emacsbugs.donarmstrong.com To: "Feng li" Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Nov 28 10:31:41 2008 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1L5zhG-0000va-Vx for geb-bug-gnu-emacs@m.gmane.org; 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Fri, 28 Nov 2008 01:25:09 -0800 (PST) In-Reply-To: <81hc5s5t2y.fsf@blackmagic-design.com> Content-Disposition: inline X-CrossAssassin-Score: 2 X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 3) Resent-Date: Fri, 28 Nov 2008 04:30:17 -0500 X-BeenThere: bug-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:22734 Archived-At: merge 872 1446 1447 1448 quit On Fri, Nov 28, 2008 at 06:15, Feng li wrote: > Start emacs with "-q". Press "C-h b" to bring up the keybinding > help. Switch to the keybinding help window and press "PgDn" a few times > will cause emacs to crash. > > I have rebuilt a new emacs binary with debug info and attached the back > trace of the crash location at below. What you're seeing is bug#872 (also #1179). I originally thought it depended on `display-unibyte-via-language-environment', but it is not so; I've seen it (and suffered it) through several different incarnations. What they all have in common: - Using a "recent" MinGW GCC (4.2.1, 4.3.0-alpha, etc.) - Compiling with optimization - Trying to display unibyte (or, perhaps, some composed characters, I'm not sure) - It *always* happens when draw_glyphs is running - It mostly happens in fill_glyph_string I can reproduce it at will in a lot of ways, for example: M-x ucs-insert AEGEAN CHECK MARK or (let ((my-map (make-keymap))) (suppress-keymap my-map) (substitute-command-keys "\\{my-map}")) or having `display-unibyte-via-language-environment' set to t and `debug' being called for whatever reason, etc. etc. I've been trying to debug it, without success (it doesn't help that I know very little about the glyph handling code). I'm not even sure whether it is a compiler bug, or a bug in Emacs (it happens in code that was undergoing changes quite recently). Juanma